Located on the Sunshine Coast, Ewen Maddock Dam is part of South East Queensland’s drinking water supply.

It is an un-gated dam, meaning that when it reaches 100 per cent capacity, water flows over the spillway and safely out of the dam. If you would like to be notified when Ewen Maddock Dam begins to spill, please sign up to our free dam release notification service.


Ewen Maddock Dam is a popular recreation destination for locals and visitors. Along with boating and fishing, the multi-use trails are particularly popular, accommodating walkers, horse and bike riders.

Horse and bike riders, please ensure that you are only using the multi-use trails, not the trails signed as walking only.

Download the Ewen Maddock Recreation Guide* for a location map, activity guide and safety information.

Note: Recreation at, and access to, our sites may have changed since the recreation guides were published in 2014. We are in the process of updating these guides to simple one-page recreation maps. Until then, please refer to www.seqwater.com.au/recreation for the most recent updates about recreation activities and site access.

Key facts

Name: Ewen Maddock Dam
Watercourse: Addlington Creek
Catchment area: 21.0km 2
Length of dam wall: 660.0m
Year completed: 1982
Type of construction: Zoned earthfill embankment
Fully supply capacity: 16587ML
Current capacity: 16,441 (99.1% full) at 29-04-2017 5:11pm